US Bridges

CR 40 over Platte River

Fair

Benton County, Minnesota · 1.6 MI W of JCT TH 10 · Structure no. 05527

Built
1999
26 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
161 ft
3 main spans
Daily traffic
270
2011 count
Owner
County
County Highway Agency

About this bridge

CR 40 over Platte River is a prestressed concrete stringer/multi-beam or girder carrying CR 40 over Platte River in Benton County, Minnesota. It was built in 1999, so it is 26 years old, younger than the Minnesota average of 38.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 270 vehicles a day, projected to reach 270 by 2039. The structure is 161 ft (49 m) long and 39 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesCR 40
CrossesPlatte River
Location1.6 MI W of JCT TH 10
RouteCounty Highway 40
CountyBenton County
StateMinnesota
Coordinates45.79712, -94.29172
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating74.3 US tons
Inventory rating44.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length161 ft (49 m)
Longest span52 ft (15.9 m)
Deck width39 ft (12 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic270 (2011)
Projected traffic270 by 2039
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was CR 40 over Platte River built?

It was built in 1999, making it 26 years old in 2025.

What condition is CR 40 over Platte River in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in October 2024.

How much traffic does CR 40 over Platte River carry?

About 270 vehicles per day (2011 count).

How long is CR 40 over Platte River?

The structure is 161 ft (49 m) long with a longest span of 52 ft (15.9 m) and a deck 39 ft wide.

Who owns CR 40 over Platte River?

It is owned by the County Highway Agency.